MacRumors posted a story that code hidden within iOS 9 files hints at upcoming iPhone improvements

"CAMCaptureCapabilities" files in iOS 9 discovered by developer Hamza Sood have file names like "[CAMCaptureCapabilities isFront1080p120Supported]," which seems to refer to the front-facing camera on the iPhone. At the current time, the front-facing "FaceTime" camera is able to capture 1.2-megapixel photos and record 720p HD video. There's no indication that these particular file names reflect Apple's upcoming plans for the front-facing camera, but it's possible that these are improvements we may see in the future.